A PACKAGING, IN PARTICULAR FOR ICE CREAM, AND A METHOD AND APPARATUS FOR THE MANUFACTURE THEREOF

Abstract: A packaging, in particular for ice cream, comprising a cup-formed waffle (1) made from an essentially plane waffle (47) baked of a substantially sugar-containing paste by moulding said plane waffle in warm workable state. The waffle (1) is formed in one piece of essentially the same thickness of material (b) and has a bottom (4) with an essentially convex bottom outline and a circumferential wall (5) folded up from the bottom without essentially causing strain thereof, said wall having at least one corrugated wall portion provided with corrugations extending from the bottom outline, the corrugation height thereof increasing in outward direction from the bottom. The application also refers to a method and an apparatus for the manufacture of the packaging.

Description: A PACKAGING, IN PARTICULAR FOR ICE CREAM, AND A METHOD AND APPARATUS FOR THE MANUFACTURE THEREOF Technical Field The invention relates a packaging, in particular for icecream, comprising a cup- formed waffle made from an essentially plane waffle baked of a substantially sugar- containing paste by moulding said paste in warm, workable state. Background Art Usually, waffles serving as packaging for icecream are cone-shaped and called waffle cones. Waffle cones may either be prepared as moulded cones by filling liquid waffle paste in a mould, said paste then being baked to finished cones and removed from the mould. Moulded cones usually have a very low sugar content, typically less than 5% in order to make it possible to remove the baked cones from the mould without damaging it. However, moulded waffle cones with a higher sugar content exist, very high demands are made to the design and surface treatment of the mould and the composition of the paste to avoid that the paste sticks to the mould during baking. Waffles with a high sugar content, i.e. a sugar content in the order of 30 to 35% or more, are usually made as rolled cone waffles, i.e. they are made in a warm and workable state by rolling up a plane, baked plane waffle to the desired cone shape. Rolled waffle cones having a high content of sugar (so-called sugar cones) are encumbered with several drawbacks. It is difficult to make them with sufficient accuracy, for which reason they often have different opening diameters and different height and thereby also different stacking measurements and volume for icecream and the like to be placed in the interior of the waffle. This is particularly a draw- back at industrial manufacture of icecream-filled waffles, as the said inaccuracy may cause problems at the handling of the waffles. Furthermore, as the waffles have been rolled up, they have a hole in the bottom, through which icecream may flow, as it melts. This drawback may sometimes be remedied by placing chocolate at the bottom of the cone and thus sealing the hole. EP 0 221 356 discloses a method and an apparatus for the preparation of cup- shaped, rolled waffles, whereby initially an essentially plane waffle is baked, which subsequently in a workable state is rolled up on a roll-up body arranged in a die. During the rolling-up process a punch forms a convex bottom on the waffle. The wall and bottom of the cup both have overlapping wall portions with increase wall thickness. Moreover, DE 25 08 533 discloses a method and an apparatus for the preparation of the bowl-shaped sugar-containing waffle. A plane, baked waffle is placed between a die and a punch. The punch is subsequently introduced into the die and the plane waffle is drawn and pressed into the shape of a bowl. This is a draw and press process comparable to a deep drawing process. In such a process, the portion of the plane waffle forming the wall of the cup is subjected to a circumferential strain increasing with radius, the annular portions of the plane waffle forming the annular portions of the wall of a smaller radius. Simultaneous with said circumferential strain, the material is subjected to an radial strain increasing with radius. Further, the weakest portion of the cup, i.e. the transition area between the portion and the side wall has to be able to withstand the pressing force necessary to obtain said deformations of the material (the paste) without this breaking, whereby a limit is set for the height of the drawn cups. In practice, it has only been possible to draw waffle cups of minor wall height. Finally, US 5,002,783 discloses an edible cup with uniform wall thickness compris¬ ing a circular bottom and a corrugated sidewall with corrugation axis radiating from the circular bottom. In column 3, lines 34 to 39 it is stated that the cup is made of a material which can be formed and baked or heated so that it is bound together in the desired cup shape. It is thus implied that the material is formed prior to baking contrary to the present invention, wherein the plane waffle is formed in a baked, workable state. Furthermore, it appears from the drawing that the corrugations are of a substantial height in the portion at the bottom and moreover, of essentially the same height in the portion at the bottom as in the portion at the outer periphery of the sidewall, which indicates that it is not a wall folded up from the bottom as in the present invention. Disclosure of the Invention The object of the invention is to provide a packaging of the type stated in the introduction remedying the drawbacks of the known cup-shaped waffles and in particular enabling a rational manufacture of high-walled waffles having a high sugar content. The packaging according to the invention is characterised in that the waffle is formed in one piece of essentially the same thickness of material and having a bottom with an essentially convex bottom outline, a circumferential wall folded up from the bottom without essentially causing any strain thereof and having at least one corrugated wall portion provided with corrugations extending from the bottom outline, the corrugation height thereof increasing in outward direction from the bottom. Such a packaging or waffle may be formed by folding a plane waffle plank upward¬ ly and is thus not provided with any openings, through which melting ice can flow and it may be made of a paste with a arbitrary high content of sugar. Moreover, the corrugated portions provide the waffle with a degree of flexibility, for which reason it can withstand larger elastic deformations than known rolled or moulded waffles, whereby advantages in relation to handling are obtained, in particular at industrial manufacture of icecream waffles, the waffle per se being less sensitive to mechani¬ cal stress. According to the invention, the pitch of the corrugation may be no more than 20% , preferably no more than 10% and most preferably no more than 5 % of the length of the outline in the corrugated portion. In practice, a relatively large number of corrugations, that is more than eight corrugations and preferably in the order of 20 to 24 corrugations, has proven advantageous in the manufacture of waffles provided with a circular bottom outline. Furthermore, according to the invention, the plane waffle may be baked of a paste having a sugar content in excess of 15 percentage by weight, preferably in excess of 25 percentage by weight and most preferably in excess of 35 percentage by weight. Moreover, according to the invention, the packaging may comprise a film wrapping arranged on the outer face of the waffle, said wrapping essentially circumscribing the waffle tightly and preferably extending beyond the upper edge thereof. This embodiment of the invention is particularly advantageous for industrially manufactured icecream waffles, as it has been found that the packaging comprising the waffle per se and the film wrapping may be produced in a single operation. At the same time, the film wrapping acts as protection for the waffle during filling and the subsequent processing and end packaging thereof. Further, the invention relates to a method for the preparation of a packaging comprising a cup-shaped integrally formed waffle made of a baked plane waffle of paste by moulding this in a warm workable state, said waffle comprising a bottom having an essentially convex bottom outline and a circumferential wall folded up therefrom having at least one corrugated portion provided with corrugations extend¬ ing from the bottom outlined. The method according to the invention is characterised by the following steps: a. placing the warm, workable plane waffle between two mould halves arran¬ ged axially displaceable in relation to each other, an inner and an outer half, respec- tively, of which at least one and preferably both are provided with a bottom-forming central part and both having a pivotal wall-forming, circumferential part having at least one section containing corrugation-forming faces, and being pivotal between an initial position, wherein the wall-forming faces are in a common plane and a forming end position corresponding to the desired form and corrugation of the packaging; b. pressing the mould halves together about the plane waffle and folding the wall portion up and at the same time folding the section(s) thereof up to be corruga¬ ted, while holding the plane waffle tight and without essentially causing any strain of the wall portion, by means of a controlled simultaneous taming of the pivotal wall-forming portions of the mould halves in order to provide the desired waffle shape, c. cooling the moulded waffle until the shape thereof is stable, d. displace the two mould halves axially from each other, e. remove the complete waffle, and f. move the mould halves back to their initial position and initial shape. As the plane waffle is controlled and held tight during the entire moulding process by the wall-forming parts of the mould halves, a controlled folding of the walls at the desired positions is obtained without any the risk of a uncontrolled folding, whereby a very high degree of accuracy and reproducibility of the folded waffle are obtained. The method is particularly advantageous in that it enables production of waffles having in principle an arbitrarily high content of sugar. According to the invention, with regard to producing a packaging which in addition to the waffle per se comprising a wrapping arranged on the outer face thereof, and subsequent to step a, a sheet of a flexible packing material may be arranged adjacent the outer mould half and between the two mould halves, whereafter the other steps are carried out for the plane waffle and the packing sheet jointly. This embodiment of the invention is particularly advantageous in that the packaging comprising the waffle per se and the wrapping may be produced in a single work operation. This in contrast to the known methods, in which the waffle is initially made and wrapping is subsequently arranged about this, which besides being more time-consuming also involves a certain risk of the waffle being damaged during arrangement of the sheet of wrapping. This is avoided by the method according to the invention, which additionally has the advantage that if the waffle is damaged or breaks, the crumbles remain in the wrapping and are thus not fed into the production equipment, where they could cause harm or obstructions. The embodiment is particularly advantageous in case the sheet of wrapping extends beyond the peri¬ phery of the plane waffle, the packaging of the icecream then being provided by merely arranging a cover sealingly at the upper edge of the sheet of packing, whereby the icecream and the waffle are circumscribed in a sealing manner by said cover and the sheet of packing. Moreover, the invention relates to an apparatus for the manufacture of a packaging comprising a cup-shaped waffle made of a baked plane waffle of paste by moulding this in a warm workable state into a continuously coherent cup with essentially uniform thickness of material, comprising an essentially plane bottom with an essentially convex bottom outline and a circumferential wall folded up therefrom having at least one corrugated wall section provided with corrugations extending from the bottom outline. The apparatus according to the invention is characterised in that it comprises: two mould halves axially displaceable to and fro each other in a frame, an inner and an outer mould half, respectively, of which at least one and preferably both are provided with a bottom-forming central part and both have a wall-forming, circumferential part being pivotally arranged in relation thereto and having at least one section containing corrugation-forming faces, and being arranged so as to pivot between an initial position, wherein the wall-forming faces are in a common plane and an end-forming position, wherein they extend in an inclined outwardly manner in direction away from the bottom-forming part to provide the wall and the intended corrugations therein, and means for a controlled simultaneous turning of the pivotal wall-forming part of the mould halves in relation to the at least one bottom-forming part in such a manner that the wall of a workable plane waffle placed between the mould halves is held tight during the folding thereof so as to not essentially cause any strain thereof. Furthermore, according to the invention, the inner and outer corrugation-forming faces may be formed of a plurality of interspaced and rod-like mould parts being pivotal in relation to their bottom-forming part, said mould parts extending radially or radiating outwardly in relation to their bottom-forming part, the rod-like mould parts of the outer wall-forming part being arranged in the interspace between the rod-like mould parts of the inner wall-forming part and vice verse. Finally, according to the invention the rod-like parts may be connected to a common mould part element by means of connecting rods, said mould part element being axially displaceably arranged in relation to the bottom-forming part of the mould half in question. Brief Description of the Drawings The invention is described in greater detail in the following with reference to the accompanying drawings, in which Fig. 1 is a top view of a packaging according to the invention comprising a cup- shaped waffle and an outer wrapping, Fig. 2 is a sectional view along the line I-I in Fig. 1, Fig. 3 is a diagrammatic, side elevational view of an apparatus according to the invention for carrying out the method according to the invention for the preparation of the a packaging according to the invention, Fig. 4 is a diagrammatic, sectional view along the line IN-IN in Fig. 3, Fig. 5 illustrates two mould halves of the apparatus shown in Fig. 4 in the initial position for moulding the packaging according to the invention; Fig. 6 illustrates two mould halves in an intermediate position during moulding of the packaging, Fig. 7 illustrates the mould halves in an end position for moulding the packaging according to the invention. Best Mode for Carrying Out the Invention The packaging shown in Figs. 1 and 2 comprise a cup-shaped waffle 1 and a wrapping 2 of a flexible packing material arranged on the outer face of the waffle and essentially circumscribing this in a tight manner. Moreover, the flexible wrap¬ ping 2 extends a length a beyond the upper edge of the waffle 1. The waffle 1 is made of a plane waffle (not shown) baked particularly of a sugar-containing paste, preferably a paste having a high content of sugar, that is a sugar content in excess of 30%, by moulding the plane waffle in a warm workable state. The waffle is integrally formed and has essentially uniform wall thickness b. The waffle 1 comprises a bottom 4 having a circular outline and being slightly dome-shaped. Furthermore, the waffle is provided with a side wall 5 inclined upwards and outwards from the outline of the bottom 4. The wall 5 is corrugated with corruga¬ tions or folds extending from the outline of the bottom 4 towards the edge of the cup. In the embodiment shown, wherein the cup is provided with a straight genera¬ trix forming an angle a with the plane of the bottom outline, the height of the corrugations increases constantly from the portion at the bottom 4 to the edge 3 of the sidewall 5. The pitch of the corrugation makes up approximately 4% of the length of the outline, i.e. the pitch circle in the corrugated portion, the cup-shaped waffle 1 in the shown embodiment having 24 corrugations. The waffle shown is not correctly drawn, but in practice, based on a plane waffle of a diameter of 175 mm, a cup- shaped waffle is formed typically having a bottom outline of a diameter of 35 mm and an upper opening being approximately 70 mm internally, i.e. at the bottom of the corrugations and externally, i.e. at the top of the corrugations being approxi¬ mately 90 mm and a height of approximately 65 mm. However, it is implicit that the waffle may have a plurality of other shapes, including being essentially cone- shaped with a bottom of a very small dimension. Finally, the waffle is provided with a plurality of circumferential, linear portions 90a, 90b, 90c of reduced wall thickness (shown as dotted lines in Fig. 2). These weakening lines which may have different courses on the wall, i.e. extend parallel to the bottom outline or have a corrugated course or extend spirally and they ensure that the waffle does not break uncontrollably, when a persons takes a bite thereof. The apparatus according to the invention shown in Figs. 3 to 7 comprises a frame 10 having two lateral uprights 11, 12, a bottom 13 and a head 14- The uprights 11, 12, the bottom 13 and the head 14 are U-shaped in cross-section and made of bent metal sheet. Two guide bars 15, 16 extend between the head 14 and bottom 13, an upper slide member 18 and a lower slide member 19 being arranged displaceably thereon by means of guide bushes 17. Both the upper slide member and the lower slide member have a U-shaped cross-section and are made of bent metal sheet. An upper shaft 20 extends between the lateral uprights 11 , 12 of the frame, said shaft being pivotally arranged in bearings 21,22 in the lateral uprights 11,12. Further, a lower shaft 23 is pivotally arranged in bearings 24,25 in the lateral uprights 11,12. The upright 11 shown on the left hand side in Fig. 3 further carries an upper step motor 26 and a lower step motor 27 intended to rotate the upper shaft 22 and the lower shaft 23, respectively. The upper step motor 26 connected to the upper shaft 20 via a pulley 28 attached to its output shaft 29, a pulley 30 attached to the upper shaft 20 and a toothed belt 31 circumscribing said two pulleys. In a corresponding manner, the lower step motor 27 connected to the shaft 23 by means of a pulley 32 attached to the output shaft 33, a pulley 34 attached to the lower shaft 23 and a a toothed belt 35 circumscribing said two pulleys. The upper step motor 26 acts to displace the upper slide member 18 and is con¬ nected thereto via a toothed belt transmission arranged at each end of the slide member. Each belt transmission comprises an upper pulley 37 fixedly connected to the upper shaft 20 and a lower pulley 38 pivotally connected to the lower shaft 23, and a toothed belt circumscribing said two pulleys 37 and 38 and being fixedly connected to the upper slide member 18. In addition to enabling a displacement of the slide member, the belt transmission at each end thereof act to prevent the slide member from tilting during displacement. In order to facilitate understanding of the drawing, the fixed connections between the belts and the shafts and the fixed connections between the slide members and the pulley are shown by means of a X, while the pivotal bearings between the shafts and the pulleys are shown by means of an O. For displacement of the lower slide member 19, the lower step motor 27 is con- nected therewith by means of a belt transmission arranged at each end of the slide member 19. Each belt transmission comprises a lower pulley 40 fixedly connected to the lower shaft 23, and an upper pulley 41 pivotally connected to the upper shaft 20, and a toothed belt 42 circumscribing the two pulleys 40,41 and being fixedly connected to the lower slide member 19. As shown in a diagrammatic view in Fig. 4, the fixed connection between the slide member 19 and the toothed belt 42 is provided by means of a fixing plate 43 screwed to the lower slide member, an edge 44 thereof pressing the belt 42 into fixed engagement with the edge 46 of a slit 45 in the lower slide member 19. The belts 39 forming part of the belt transmission for displacement of the upper slide member 18 are attached thereto in a corresponding manner. Finally, it should be noted that each of the belts 42 is passed freely mov- able through a slit (not shown) in the upper slide member 18. An inner mould half is arranged on the lower slide member for moulding the packaging or the inner outline of the cup-shaped waffle 1. With reference to Figs. 5,6, and 7, the inner mould half 50 comprises a central bottom-forming part 51 having an upper end face 52 for the formation of the bottom 4 of the packaging and being fixedly arranged, i.e. not displaceable, in relation to the frame 10, said part 51 being arranged at the end of a guide rod 53 extending through an opening in the lower slide member 19 and attached to the bottom 13. The central bottom-forming part 51 is essentially conically shaped and is provided with a plurality of (in the present embodiment 24) grooves 54 extending radially inwardly from the outer conical face 55. At the outer end of the central bottom-forming part 51, a rod-like mould part 56 is pivotally arranged in each groove, the outer edge 57 thereof being intended to mould the inner face 6 of the outward corrugations 7 of the packaging. Each of the mould parts 56 are pivotally connected to a first end of a connecting rod 58. The other end of each of the connecting rods 58 is pivotally arranged on a displaceable mould part element 59 being fixedly connected to the lower slide member 19. The displaceable mould part element 59 is arranged on the guide rod 53 for controlled axial displacement along this and is provided with 24 radial grooves 60, in each of which one of the 24 connecting rods 58 is pivotally arranged. In a descending movement of the lower slide member 19 from the initial position shown in Fig. 3 or 5, the mould parts 56 are moved from a position, in which the outer edges 57 thereof are in a common plane with the upper end face 52 of the bottom-forming part 51, to a position, in which they extend downwards and out¬ wards in a inclined manner from the pivot axis 61 with the central inner bottom- forming part 51, as shown on Fig. 6 and 7. The outer mould half 70 comprises a central outer bottom-forming part 71 provided with an upper end face 72 for the formation of the outer surface of the bottom 4 of the packaging. The central outer bottom-forming part 71 is an essentially cylindrical body arranged at the end of a guide rod 74 extending through the upper slide member 18 and provided with a stop member 75 determining the position of the end face 72 in the initial position of the outer mould half. The central outer bottom-forming part 71 is provided with 24 radial slots 76 extending inwardly from the outer cylinder face 77. An outer rod-like mould part 78 is pivotally arranged in each of the slots 76, the outward edge 79 thereof being intended to form the outer face 8 of an inwardly facing corrugation on the packag¬ ing. Each outer mould part 78 is pivotally connected to a first end of a connecting rod 80, the other end of which being pivotally connected to an upper fixed mould part 81 fixedly connected to the upper slide member 18. The upper fixed mould part 81 is provided with 24 slots 83, wherein the pivotal connection to the corresponding 24 connecting rods 80 is provided. Finally, the guide rod 74 extends through the upper fixed mould part 81 to obtain a controlled axial movement in relation thereto. From the initial position shown in Fig. 3 and 5, wherein the edges 79 of the outer rod-like mould parts 78 are in a common plane with the upper end face 72 of the central outer bottom-forming part 71, the outer mould half 70 may be move to a position, wherein the edges of the rod-like mould parts 78 extend outwards and downwards as shown in Fig. 6 and 7. The apparatus according to the invention operates in the following manner: In an initial position as shown in Fig. 3, a plane waffle 47 baked of a sugar-contain- ing paste and still in a warm, workable state is placed on the lower inner mould half. In addition, a sheet of a flexible packing material (not shown) may be placed on top of the plane waffle 47, said material extending beyond the periphery of the plane waffle. In the initial position shown the edges 57 of the rod-like mould parts 56 and the end face 52 of the bottom-forming part 51 are in a common plane. The upper outer mould half 70 is also in an initial position, in which the edges 79 of the rod-like mould parts 78 and the end face 72 of the bottom-forming part 71 are in a common plane. The upper slide member 18 is then moved downwards by activating the step motor 26, until the upper outer mould half 70 is in the position shown in Fig. 5, which is the starting position for the actual moulding of the packaging or waffle. At the same time as the upper outer mould half continues its downward movement, the lower slide member 19 is moved downwards by activating the step motor 27. During this downwards movement, the central bottom-forming part 51 of the inner lower mould half 50 remains fixed, i.e. it does not move, while the rod-like mould parts 56 are pivoted downwards about their pivot axis 61 in relation to the fixed central bottom-forming part 51 (confer Fig. 6). The continuous downward movement of the upper slide member 18 causes the rodlike mould parts 78 of the outer mould half 70 to pivot downwardly about the pivot axis 82 in relation to the central outer bottom-forming part 71, the downward movement of the outer bottom-forming part 71 being prevented by the abutment to the fixed inner bottom-forming part with the plane waffle 47 as an intermediary layer. During said simultaneous movement of the upper and lower slide members 18,19, the rod-like mould parts 78 of the outer mould half 70 arranged on the bisector of the interspaces between the rod-like mould parts 56 of the inner mould half 50 are gradually moved into said interspaces, the edges 79,58 of the rod-like mould parts 78,56 gradually providing a corrugation of the outer portion of the plane waffle at the same time as said portion is folded up in relation to the original plane for formation of a packaging or waffle provided with a wall having the desired inclination and corrugation for instance provided by the end position shown in Fig. 7. It should, however, be noted that the movement can be stopped in any position between those shown in Fig. 5 and Fig. 7 for obtaining the desired shape of the waffle. Having obtained the desired shape of the waffle, the moulded waffle is cooled, until it is stable in shape. This cooling may be expedited by adding cooling air. Subsequent to the above, the upper slide member is moved upwards to the position shown in Fig. 3, whereafter the formed waffle is removed from the inner mould half, and the lower slide member is in conclusion moved upwards to the initial position shown in Fig. 3. A new plane waffle and a new sheet of packing material, if any, may then be placed on the inner mould half as described above. During formation of the sidewalls and the corrugations therein, the two slide members 18, 19 are moved by activating the step motors relative to each other by means of a control unit (not shown) in such a manner that the rod-like mould parts 56,78 of the two mould halves 50,70 pivoted relative to each other so that the plane waffle is held tight continuously without essentially causing any strain thereof. In this respect, it is advantageous that pivot axis 61,82 between the rod-like mould parts 56,78 and the bottom-forming part 51, 71 is as close to the upper surface 52,72 of the bottom-forming part 51,71 as possible and that the two sets of the pivot axes 61,82 are only slightly interspaced, and preferably coincident. The invention may amended in many ways without thereby deviating from the scope of the invention. It is thus of course possible to arrange the inner mould half as the upper mould half instead of the shown arrangement of the mould halves, if desired. Moreover, at least one of the mould halves, in particular the lower one, or prefer¬ ably both mould halves may be provided with a membrane (not shown), for instance of PFTE film placed on the forming edges of the rod-like mould parts in such a manner that it covers these and the interspaces therebetween, and if desired, also the surface of the bottom-forming part. This or these PTFE membrane(s) support(s) the plane waffle during moulding thereof, which may be advantageous at certain types of paste, and at the same time prevent(s) paste residues or crumbles from entering the rod mechanism of the lower mould half.

Claims: Claims 1. A packaging, in particular for icecream, comprising a cup-formed waffle (1) made from an essentially plane waffle (47) baked of a substantially sugar-con¬ taining paste by moulding said plane waffle in warm workable state, charade- r i s e d in that the waffle (1) is formed in one piece of essentially the same thick¬ ness of material (b) and having a bottom (4) with an essentially convex bottom outline and a circumferential wall (5) folded up from the bottom without essentially causing any thereof strain, said wall having at least one corrugated wall portion provided with corrugations extending from the bottom outline, the corrugation height thereof increasing in outward direction from the bottom. 2. A packaging according to claim 1, characterised in that the pitch of the corrugation is no more than 20%, preferably no more than 10% and most preferably no more than 5 % of the length of the outline in the corrugated portion. 3. A packaging according to claim 1 or 2, characterised in that the plane waffle is made from a paste having a sugar content in excess of 15 percentage by weight, preferably in excess of 25 percentage by weight and most preferably in excess of 35 percentage by weight. 4. A packaging according to one or more of the preceding claims, cha¬ racterised in that it comprises a film wrapping arranged on the outer face of the waffle (1), said wrapping essentially circumscribing the waffle tightly and preferably extending beyond the upper edge (3) thereof. 5. A method of preparing a packaging comprising an integrally formed cup- shaped waffle (1) made of a plane waffle of paste by moulding this in a warm, workable state, said waffle (1) comprising a bottom (4) having an essentially convex bottom outline and a circumferential wall (5) folded up therefrom having at least one corrugated portion provided with corrugations extending from the bottom outline, characterised in that it comprises the following steps: a. placing the warm, workable plane waffle (47) between two mould halves (70, 50) arranged axially displaceable in relation to each other, an inner and an outer half, respectively, of which at least one and preferably both are provided with a bottom-forming central part (51,71) and both having a pivotal wall-forming, circumferential parts (56,78) having at least one section containing corrugation- forming faces (57,79), and being pivotal between an initial position, wherein the wall-forming faces are in a common plane and a forming end position corresponding to the desired form and corrugation of the packaging; b. pressing the mould halves together about the plane waffle (47) and folding the wall portion up and at the same time folding the section(s) thereof to be corruga¬ ted, while holding the plane waffle (47) tight and without essentially causing any strain of the wall portion, by means of a controlled simultaneous turning of the pivotal wall-forming parts (56,78) of the mould halves (50,70), in order to provide the desired waffle shape, c. cooling the moulded waffle until the shape thereof is stable, d. displace the two mould halves (50,70) axially from each other, e. remove the complete waffle, and f. move the mould halves (50,70) back to their initial position and initial shape. 6. A method according to claim 5 for the preparation of a packaging, which in addition to the waffle (1) comprises a wrapping (2) arranged on the outer face thereof, c h a r a c t e r i s e d in that subsequent to step (a) a sheet of a flexible packing material is arranged adjacent the outer mould half (70) and between the two mould halves (50,70), whereafter the other steps are carried out for the plane waffle (47) and the packing sheet jointly. 7. An apparatus for the manufacture of a packaging comprising a cup-shaped waffle made of a baked plane waffle (47) of paste by moulding this in a warm workable state into a continuously coherent cup with essentially uniform thickness of material (b), comprising an essentially plane bottom (4) with an essentially convex bottom outline and a circumferential wall (5) folded up therefrom having at least one corrugated wall section provided with corrugations extending from the bottom outline, c h a r a c t e r i s e d in that it comprises: two mould halves (50,70) axially displaceable to and fro each other in a frame, an inner and an outer mould half, respectively, of which at least one and preferably both are provided with a bottom-forming central part (51,71) and both have a wall-forming, circumferential part (56,78) being pivotally arranged in relation thereto and having at least one section containing corrugation-forming faces (57,79), and being arranged so as to pivot between an initial position, wherein the wall-forming faces (57,79) are in a common plane and an end-forming position, wherein they extend in an inclined outwardly manner in direction away from the bottom-forming part (51,71) to provide the wall and the intended corrugations therein, means for a controlled simultaneous turning of the pivotal wall-forming part (56,78) of the mould halves (50,70) in relation to the at least one bottom-forming part (51,71) in such a manner that the wall of a workable plane waffle (47) placed between the mould halves is held tight during the folding thereof so as to not cause any strain thereof. 8. An apparatus according to claim 7, c h a r a c t e r i s e d in that the outer and inner corrugation-forming faces (79,57) are formed of a plurality of interspaced and rod-like mould parts (78,56) being pivotal in relation to their bottom-forming part (71,51), said rod-like mould parts extending radially or radiating outwardly in relation to their bottom-forming part (71,51), the rod-like mould part (78) of the outer wall-forming part being arranged in the interspace between the rod-like mould parts (56) of the inner wall-forming part and vice verse. 9. An apparatus according to claim 8, characterised in that the rod¬ like parts (56, 78) are connected to a common mould half elements (81,59) by means of connecting rods (58,80), said mould half element being axially displace- ably arranged in relation to the bottom-forming part (51,71) of the mould half (50,70) in question.

Inventors: KLOEFT HENRIK, KLOEFT, HENRIK
Applicants: KLOEFT HENRIK, KLOEFT, HENRIK
Application year: 1994
Main classification: A21B5
IPC codes: A21B5, A21C15, B65D65